code: def prev_widen(self, indices, magnifier, noise=None):
      if self.in_bottle:
          self.in_bottle.prev_widen(indices, magnifier, noise=noise)
      else:
          for branch in self.branches:
              branch.prev_widen(indices, magnifier, noise=noise)
  
file_path: auptimizer/src/aup/Proposer/eas/models/layer_multi_branch.py
imports: import tensorflow
  import numpy
  from .layer_cascade import LayerCascade
label_desc: Use image node_id 11 for calling the LayerMultiBranch obj's underlying member method code with example usage: obj.prev_widen(indices, magnifier, noise) without return types